fix: move tooltip text assignment to show handler

1. Move tooltip text assignment from property initialization to
onTriggered handler
2. This ensures the trash tip text is dynamically updated when tooltip
is shown
3. Fixes potential stale trash status display in tooltips
4. Maintains same functionality but with proper timing

fix: 将工具提示文本赋值移动到显示处理程序

1. 将工具提示文本赋值从属性初始化移动到 onTriggered 处理程序
2. 确保垃圾桶提示文本在工具提示显示时动态更新
3. 修复工具提示中可能显示过时垃圾桶状态的问题
4. 保持相同功能但具有正确的时机控制

PMS: BUG-336825

Author: wjyrich

panels/dock/taskmanager/package/AppItem.qml

@@ -369,7 +369,6 @@ Item {
 
         PanelToolTip {
             id: toolTip
-            text: root.itemId === "dde-trash" ? root.name + "-" + taskmanager.Applet.getTrashTipText() : root.name
             toolTipX: DockPanelPositioner.x
             toolTipY: DockPanelPositioner.y
         }
@@ -388,6 +387,7 @@ Item {
             onTriggered: {
                 var point = root.mapToItem(null, root.width / 2, root.height / 2)
                 toolTip.DockPanelPositioner.bounding = Qt.rect(point.x, point.y, toolTip.width, toolTip.height)
+                toolTip.text = root.itemId === "dde-trash" ? root.name + "-" + taskmanager.Applet.getTrashTipText() : root.name
                 toolTip.open()
             }
         }